**From:** Adaikalavan Ramasamy (*gisar@nus.edu.sg*)

**Date:** Tue 29 Apr 2003 - 16:02:33 EST

**Next message:**Jerome Asselin: "Re: [R] thick plot lines"**Previous message:**Faheem Mitha: "[R] thick plot lines"**Maybe in reply to:**Faheem Mitha: "[R] thick plot lines"**Next in thread:**Jerome Asselin: "Re: [R] thick plot lines"

Message-id: <024D6AEFCB92CB47BA1085751D184BB80105F24C@MBXSRV03.stf.nus.edu.sg>

Please give us a reproducible example. I don't know of cdf.inv, theta,

empmargdistvec, ...

Why should qqplot produce lines ? If you meant to say the axis, then

look under axis(). If you meant the plotting symbols, then use the pch

argument as bellow. One trick would be to plot using the character '.'

instead.

y <- rt(200, df = 5)

qqplot(y, rt(300, df = 5), pch=".")

If you meant the qqline, then you can supply the lty, col argument

inside qqline().

y <- rt(200, df = 5)

qqnorm(y)

qqline(y, col = 2, lty=3)

Reading par() might be useful.

Regards, Adai.

-----Original Message-----

From: Faheem Mitha [mailto:faheem@email.unc.edu]

Sent: Tuesday, April 29, 2003 1:09 PM

To: r-help@stat.math.ethz.ch

Subject: [R] thick plot lines

Dear People,

In a qqplot I am doing, I get lines/points that are very thick. I've

tried setting the lwd variable to 0.1, but it doesn't seem to have any

effect. Also, I have set the value of lty to dashed, but I still get

dots. The command looks like

qqplot(cdf.inv(seq(0,1,length=size),theta,pos,len),empmargdistvec(len,th

eta,pos,size),

xlim=c(-theta,theta), ylim=c(-theta,theta), lwd=0.1,

xlab="Marginal Quartiles", ylab="Empirical Marginal", col="red",

lty="dashed")

I tried putting

par(lty="dashed",lwd=0.1)

before this, but this doesn't have any effect either.

I'm now wondering if I am doing something wrong. Does qqplot perhaps not

accept these parameters? What should I do to make the lines/points

thinner?

Faheem.

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